Haycock, A., Cohen, J., Saunders, B., Cotton, P. B., & Williams, C. B. (2014). Cotton and Williams' practical gastrointestinal endoscopy: The fundamentals (7th edition.). Blackwell Publishing John Wiley. https://doi.org/10.1002/9781118406427
Παραπομπή σε μορφή Chicago (17η εκδ.)Haycock, Adam, Jonathan Cohen, Brian Saunders, Peter B. Cotton, και Christopher B. Williams. Cotton and Williams' Practical Gastrointestinal Endoscopy: The Fundamentals. 7th edition. Chichester, West Sussex, UK ; Hoboken, NJ: Blackwell Publishing John Wiley, 2014. https://doi.org/10.1002/9781118406427.
Παραπομπή σε μορφή MLA (8th εκδ.)Haycock, Adam, et al. Cotton and Williams' Practical Gastrointestinal Endoscopy: The Fundamentals. 7th edition. Blackwell Publishing John Wiley, 2014. https://doi.org/10.1002/9781118406427.
